ietf: ^([Rr][Ff][Cc]:[0-9]+|[Ff][Yy][Ii]:[0-9]+|[Ss][Tt][Dd]:[0-9]+|[Bb][Cc][Pp]:[0-9]+|[Ii][Dd]:(([0-9A-Za-z]|-)+)|[Mm][Tt][Gg]:(([0-9A-Za-z]|-)+)|(([0-9A-Za-z]|-)+))$
iso: ^[Ss][Tt][Dd]:([Ii][Ss][Oo]|[Ii][Ss][Oo]-[Ii][Ee][Cc]|[Ii][Ss][Oo]-[Cc][Ii][Ee]|[Ii][Ss][Oo]-[Aa][Ss][Tt][Mm]|[Ii][Ss][Oo]-[Ii][Ee][Ee][Ee]|[Ii][Ee][Cc])(:([Dd][Aa][Tt][Aa]|[Gg][Uu][Ii][Dd][Ee]|[Ii][Ss][Pp]|[Ii][Ww][Aa]|[Pp][Aa][Ss]|[Rr]|[Tt][Rr]|[Tt][Ss]|[Tt][Tt][Aa]))?:[0-9][0-9]*(:(-([0-9A-Za-z]|-)+))?((:(([Dd][Rr][Aa][Ff][Tt]|[Cc][Aa][Nn][Cc][Ee][Ll][Ll][Ee][Dd])|[Ss][Tt][Aa][Gg][Ee]-[0-9][0-9].[0-9][0-9](.[Vv][0-9][0-9]*)?))?:[Ee][Dd]-[0-9][0-9]*)?(:([Vv]([0-9][0-9]*|[0-9][0-9]*(-([Aa][Mm][Dd]|[Cc][Oo][Rr]|[Aa][Dd][Dd])[0-9][0-9]*(.[Vv][0-9][0-9]*)?)*)))?(:(([Ee][Nn]|[Ff][Rr]|[Rr][Uu]|[Ee][Ss]|[Aa][Rr])|([Ee][Nn],[Ff][Rr]|[Ee][Nn],[Rr][Uu]|[Ff][Rr],[Rr][Uu])|[Ee][Nn],[Ff][Rr],[Rr][Uu]))?(:([Aa][Mm][Dd]|[Cc][Oo][Rr]|[Aa][Dd][Dd]):[0-9][0-9]*(:[Vv][0-9][0-9]*)?(:(([Ee][Nn]|[Ff][Rr]|[Rr][Uu]|[Ee][Ss]|[Aa][Rr])|([Ee][Nn],[Ff][Rr]|[Ee][Nn],[Rr][Uu]|[Ff][Rr],[Rr][Uu])|[Ee][Nn],[Ff][Rr],[Rr][Uu]))?)*(:([Cc][Ll][Aa][Uu][Ss][Ee]|[Ff][Ii][Gg][Uu][Rr][Ee]|[Tt][Aa][Bb][Ll][Ee]|[Tt][Ee][Rr][Mm]):(((([A-Za-z]|[0-9][0-9]*)(.[0-9][0-9]*)*)|(([A-Za-z]|[0-9][0-9]*)(.[0-9][0-9]*)*)-(([A-Za-z]|[0-9][0-9]*)(.[0-9][0-9]*)*))(,((([A-Za-z]|[0-9][0-9]*)(.[0-9][0-9]*)*)|((([A-Za-z]|[0-9][0-9]*)(.[0-9][0-9]*)*)-(([A-Za-z]|[0-9][0-9]*)(.[0-9][0-9]*)*))))*))*((:[Tt][Ee][Cc][Hh]:.*|[A-Za-z]*))?$